Multiport network approach for modelling and analysis of microstrip patch antennas and arrays

This chapter describes the multiport network approach, segmentation desegmentation techniques, and their applications to design of microstrip antennas. Relevant aspects of various models for microstrip antennas are presented. The multiport network model, which is an extension of the well known cavity model for microstrip patches, is discussed. Evaluation of multiport impedance matrices from the Green's functions for various types of segments is described. Modelling of external fields (including fringing, radiation and surface wave) by edge-admittance networks is detailed.